CONTROLS FOR NEW SOURCES OF TOXIC AIR POLLUTANTS …

Chapter 173-460 WACCONTROLS FOR NEW SOURCES OF TOXIC AIR POLLUTANTS

Last Update: 11/22/19WAC173-460-010 Purpose.173-460-020 Definitions.173-460-030 Applicability.173-460-040 New source review.173-460-050 Requirement to quantify emissions.173-460-060 Control technology requirements.173-460-070 Ambient impact requirement.173-460-071 Voluntary limits on emissions.173-460-080 First tier review.173-460-090 Second tier review.173-460-100 Third tier review.173-460-140 Remedies.173-460-150 Table of ASIL, SQER and de minimis emission values.

DISPOSITION OF SECTIONS FORMERLY CODIFIED IN THIS CHAPTER173-460-110 Acceptable source impact levels. [Statutory Authority: Chapter 70.94 RCW. WSR 94-03-072

(Order 93-19), § 173-460-110, filed 1/14/94, effective 2/14/94. Statutory Authority: RCW 70.94.331. WSR 91-13-079 (Order 90-62), § 173-460-110, filed 6/18/91, effective 9/18/91.] Repealed by WSR 09-11-131 (Order 05-19), filed 5/20/09, effective 6/20/09. Statutory Au-thority: Washington Clean Air Act, RCW 70.94.152.

173-460-120 Scientific review and amendment of acceptable source impact levels and lists. [Statutory Authority: RCW 70.94.331. WSR 91-13-079 (Order 90-62), § 173-460-120, filed 6/18/91, ef-fective 9/18/91.] Repealed by WSR 09-11-131 (Order 05-19), filed 5/20/09, effective 6/20/09. Statutory Authority: Washington Clean Air Act, RCW 70.94.152.

173-460-130 Fees. [Statutory Authority: RCW 70.94.331. WSR 91-13-079 (Order 90-62), § 173-460-130, filed 6/18/91, effective 9/18/91.] Repealed by WSR 09-11-131 (Order 05-19), filed 5/20/09, effective 6/20/09. Statutory Authority: Washington Clean Air Act, RCW 70.94.152.

173-460-160 Class B toxic air pollutants and acceptable source impact levels. [Statutory Authority: Chapter 70.94 RCW. WSR 94-03-072 (Order 93-19), § 173-460-160, filed 1/14/94, effective 2/14/94. Statutory Authority: RCW 70.94.331. WSR 91-13-079 (Order 90-62), § 173-460-160, filed 6/18/91, effective 9/18/91.] Repealed by WSR 09-11-131 (Order 05-19), filed 5/20/09, effective 6/20/09. Statutory Authority: Washington Clean Air Act, RCW 70.94.152.

WAC 173-460-010 Purpose. (1) Pursuant to chapter 70.94 RCW, Washington Clean Air Act, the purpose of this chapter is to establish the systematic control of new or modified sources emitting toxic air pollutants (TAPs) in order to prevent air pollution, reduce emissions to the extent reasonably possible, and maintain such levels of air quality as will protect human health and safety. Toxic air pollutants include carcinogens and noncarcinogens listed in WAC 173-460-150.

(2) This chapter establishes three major requirements:(a) Best available control technology for toxics;(b) Toxic air pollutant emission quantification;(c) Human health and safety protection demonstration.(3) Policy. It is the policy of ecology to reduce, avoid, or

eliminate toxic air pollutants prior to their generation whenever eco-nomically and technically practicable.[Statutory Authority: Washington Clean Air Act, RCW 70.94.152. WSR 09-11-131 (Order 05-19), § 173-460-010, filed 5/20/09, effective 6/20/09. Statutory Authority: RCW 70.94.331. WSR 91-13-079 (Order 90-62), § 173-460-010, filed 6/18/91, effective 9/18/91.]

WAC 173-460-020 Definitions. The definitions of terms contained in chapter 173-400 WAC are incorporated into this chapter by refer-ence. Terms specific to this chapter are defined as follows:

(1) "Acceptable source impact analysis" means a procedure for demonstrating compliance with WAC 173-460-070, that compares maximum incremental ambient air impacts with applicable acceptable source im-pact levels (ASIL).

Certified on 12/30/2019

(2) "Acceptable source impact level (ASIL)" means a screening concentration of a toxic air pollutant in the ambient air. The ASIL for each toxic air pollutant is listed in WAC 173-460-150.

(3) "Best available control technology for toxics (tBACT)" means best available control technology, as that term is defined in WAC 173-400-030, as applied to toxic air pollutants.

(4) "De minimis emissions" means trivial levels of emissions that do not pose a threat to human health or the environment. The de mini-mis emission threshold values are listed in WAC 173-460-150.

(5) "Increased cancer risk of one in one hundred thousand" means the 95th percent upper bound on the estimated risk of one additional cancer above the background cancer rate per one hundred thousand indi-viduals continuously exposed to a carcinogenic toxic air pollutant at a given average dose for a specified time.

(6) "New or modified toxic air pollutant source" means the con-struction or modification of a stationary source that increases the amount of any toxic air pollutant emitted by such source or that re-sults in the emission of any toxic air pollutant not previously emit-ted.

(7) "Small quantity emission rate (SQER)" means a level of emis-sions below which dispersion modeling is not required to demonstrate compliance with acceptable source impact levels. SQERs are listed in WAC 173-460-150.

(8) "Toxic air pollutant (TAP)" means any toxic air pollutant listed in WAC 173-460-150.[Statutory Authority: Washington Clean Air Act, RCW 70.94.152. WSR 09-11-131 (Order 05-19), § 173-460-020, filed 5/20/09, effective 6/20/09. Statutory Authority: Chapter 70.94 RCW. WSR 94-03-072 (Order 93-19), § 173-460-020, filed 1/14/94, effective 2/14/94. Statutory Au-thority: RCW 70.94.331. WSR 91-13-079 (Order 90-62), § 173-460-020, filed 6/18/91, effective 9/18/91.]

WAC 173-460-030 Applicability. The provisions of this chapter apply statewide. WAC 173-460-090 and 173-460-100 must be implemented solely by ecology.[Statutory Authority: Washington Clean Air Act, RCW 70.94.152. WSR 09-11-131 (Order 05-19), § 173-460-030, filed 5/20/09, effective 6/20/09. Statutory Authority: Chapter 70.94 RCW. WSR 94-03-072 (Order 93-19), § 173-460-030, filed 1/14/94, effective 2/14/94. Statutory Au-thority: RCW 70.94.331. WSR 91-13-079 (Order 90-62), § 173-460-030, filed 6/18/91, effective 9/18/91.]

WAC 173-460-040 New source review. (1) Applicability and exemp-tions. This chapter supplements the new source review requirements of WAC 173-400-110 by adding review requirements for new and modified toxic air pollutant sources. An action that is exempt from new source review under WAC 173-400-110 (4) or (5) is exempt under this chapter as well, except that a local air authority may adopt its own list of exemptions in accordance with RCW 70.94.331 (2)(b) to operate in lieu of or in addition to the exemptions in WAC 173-400-110 (4) and (5). An action that requires a notice of construction application under WAC 173-400-110 is subject to the review requirements of this chapter, un-less the emissions before control equipment of each TAP (rounded to


two significant digits) from a new source or the increase in emissions from each modification is less than the applicable de minimis emission threshold for that TAP listed in WAC 173-460-150.

(2) New source review of a modification is limited to the emis-sion unit or units proposed to be modified and the TAPs whose emis-sions would increase as a result of the modification.

(3) The permitting authority that is reviewing a notice of con-struction application for a new or modified toxic air pollutant source must ensure that:

(a) The new or modified emission units use tBACT for emissions control for the TAPs with emission increases that trigger the need to submit a notice of construction application; and

(b) The new or modified emission units comply with WAC 173-460-070 as demonstrated by using the procedures established in WAC 173-460-080 or, failing that, demonstrates compliance by using the ad-ditional procedures in WAC 173-460-090 and/or 173-460-100.[Statutory Authority: Chapter 70.94 RCW. WSR 19-24-025 (Order 18-07), § 173-460-040, filed 11/22/19, effective 12/23/19. Statutory Authori-ty: Washington Clean Air Act, RCW 70.94.152. WSR 09-11-131 (Order 05-19), § 173-460-040, filed 5/20/09, effective 6/20/09. Statutory Au-thority: Chapter 70.94 RCW. WSR 94-03-072 (Order 93-19), § 173-460-040, filed 1/14/94, effective 2/14/94. Statutory Authority: RCW 70.94.331. WSR 91-13-079 (Order 90-62), § 173-460-040, filed 6/18/91, effective 9/18/91.]

WAC 173-460-050 Requirement to quantify emissions. (1) New sources.

A notice of construction application for a new or modified toxic air pollutant source must quantify the increase in the emissions of each TAP, after application of tBACT, emitted by the new or modified emission units.

(2) Small quantity emission rates.A notice of construction application that relies on SQERs rather

than dispersion modeling to demonstrate compliance with WAC 173-460-070 must quantify the increase in emissions of each TAP emit-ted by the new or modified emission units after application of tBACT. The quantification must contain sufficient detail to demonstrate to the satisfaction of the permitting authority that the increase in emissions is less than the applicable small quantity emission rates listed in WAC 173-460-150.

(3) Level of detail.An acceptable source impact level analysis under WAC 173-460-080

may be based on a conservative estimate of emissions that represents good engineering judgment. If compliance with WAC 173-460-070 and 173-460-080 cannot be demonstrated, more precise emission estimates may be used to demonstrate compliance with WAC 173-460-090.[Statutory Authority: Washington Clean Air Act, RCW 70.94.152. WSR 09-11-131 (Order 05-19), § 173-460-050, filed 5/20/09, effective 6/20/09. Statutory Authority: Chapter 70.94 RCW. WSR 94-03-072 (Order 93-19), § 173-460-050, filed 1/14/94, effective 2/14/94. Statutory Au-thority: RCW 70.94.331. WSR 91-13-079 (Order 90-62), § 173-460-050, filed 6/18/91, effective 9/18/91.]


WAC 173-460-060 Control technology requirements. (1) Except as provided for in WAC 173-460-040, a person shall not establish, oper-ate, or cause to be established or operated any new or modified toxic air pollutant source which is likely to increase TAP emissions without installing and operating tBACT.

(2) A notice of construction application for a new or modified toxic air pollutant source must demonstrate that the new or modified emission units will employ tBACT for all TAPs for which the increase in emissions will exceed de minimis emission values as found in WAC 173-460-150. TAP emission increases from nonprocess fugitive emissions activities such as construction or demolition sites, unpaved and paved roads, coal piles, waste piles and fuel and ash handling operations are exempt from the requirement to apply tBACT.[Statutory Authority: Washington Clean Air Act, RCW 70.94.152. WSR 09-11-131 (Order 05-19), § 173-460-060, filed 5/20/09, effective 6/20/09. Statutory Authority: RCW 70.94.860, 70.94.510 and 70.94.331. WSR 98-15-129 (Order 98-04), § 173-460-060, filed 7/21/98, effective 8/21/98. Statutory Authority: Chapter 70.98 RCW. WSR 98-04-062 (Order 97-38), § 173-460-060, filed 2/2/98, effective 3/5/98. Statutory Au-thority: Chapter 70.94 RCW. WSR 94-03-072 (Order 93-19), § 173-460-060, filed 1/14/94, effective 2/14/94. Statutory Authority: RCW 70.94.331. WSR 91-13-079 (Order 90-62), § 173-460-060, filed 6/18/91, effective 9/18/91.]

WAC 173-460-070 Ambient impact requirement. A notice of con-struction application must demonstrate that the increase in emissions of toxic air pollutants from the new or modified emission units at the source are sufficiently low to protect human health and safety from potential carcinogenic and/or other toxic effects. Compliance must be demonstrated in any area to which the applicant does not restrict or control access. The application must demonstrate compliance by using procedures established in this chapter after complying with the con-trol technology requirements in WAC 173-460-060.[Statutory Authority: Washington Clean Air Act, RCW 70.94.152. WSR 09-11-131 (Order 05-19), § 173-460-070, filed 5/20/09, effective 6/20/09. Statutory Authority: RCW 70.94.331. WSR 91-13-079 (Order 90-62), § 173-460-070, filed 6/18/91, effective 9/18/91.]

WAC 173-460-071 Voluntary limits on emissions. (1) If requested by an applicant, the permitting authority may issue a regulatory order that limits emissions of a particular TAP to a level that is lower than the potential emissions of that particular TAP otherwise allowed under all applicable requirements of chapter 70.94 RCW and the federal Clean Air Act.

(2) Any order issued under this section is subject to the notice and comment procedures in WAC 173-400-171 or the permitting authori-ty's public notice and commenting procedures.

(3) Any order issued under this section must include monitoring, recordkeeping, and reporting requirements sufficient to ensure that the applicant complies with any conditions established under this sec-tion. Monitoring requirements must use terms, test methods, units, averaging periods, and other statistical conventions consistent with the requirements of WAC 173-400-105.


[Statutory Authority: Washington Clean Air Act, RCW 70.94.152. WSR 09-11-131 (Order 05-19), § 173-460-071, filed 5/20/09, effective 6/20/09.]

WAC 173-460-080 First tier review. (1) A notice of construction application for a new or modified toxic air pollutant source must in-clude an acceptable source impact level analysis for each TAP emitted by the new or modified emission units with an emission increase great-er than the de minimis emission level specified in WAC 173-460-150. The permitting authority may complete this analysis.

(2) The acceptable source impact analysis requirement of WAC 173-460-070 can be satisfied for any TAP using either dispersion mod-eling or the small quantity emission rate.

(a) Dispersion modeling. The applicant who relies on dispersion modeling must model the increase in the emissions of each TAP emitted by the new or modified emission units, after application of tBACT. The notice of construction application must demonstrate that the modeled ambient impact (rounded to two significant digits) of the aggregate emissions increase of each TAP does not exceed the ASIL for that TAP as listed in WAC 173-460-150. If concentrations predicted by disper-sion screening models exceed applicable acceptable source impact lev-els, more refined modeling and/or emission techniques must be used. Refined modeling techniques must be approved by the permitting author-ity.

(b) Small quantity emission rates. An applicant may show for any TAP that the increase in emissions of that TAP (rounded to two signif-icant digits), after application of tBACT, is less than the small quantity emission rate listed for that TAP in WAC 173-460-150.

(3) Reduction of TAPs from existing emission units. An applicant may include in an acceptable source impact analysis proposed reduc-tions in actual emissions of a particular TAP from emission units at the source that are not new or modified for the purpose of offsetting emissions of that TAP caused by the new or modified source. The reduc-tions in TAP emissions authorized by this subsection must be included in the approval order as enforceable emission limits and must meet all the requirements of WAC 173-460-071.

(4) Decision criteria.(a) If the permitting authority finds that the modeled impact of

the increase in emissions of a TAP from the new or modified emission units does not exceed the ASIL for that TAP then the authority may ap-prove the notice of construction application.

(b) If the permitting authority finds that the modeled impact of the increase in emissions of a TAP from the new or modified emission units exceeds the ASIL for that TAP then the permitting authority may not approve the project. The applicant may file a second tier review application in compliance with WAC 173-460-090.[Statutory Authority: Chapter 70.94 RCW. WSR 19-24-025 (Order 18-07), § 173-460-080, filed 11/22/19, effective 12/23/19. Statutory Authori-ty: Washington Clean Air Act, RCW 70.94.152. WSR 09-11-131 (Order 05-19), § 173-460-080, filed 5/20/09, effective 6/20/09. Statutory Au-thority: Chapter 70.94 RCW. WSR 94-03-072 (Order 93-19), § 173-460-080, filed 1/14/94, effective 2/14/94. Statutory Authority: RCW 70.94.331. WSR 91-13-079 (Order 90-62), § 173-460-080, filed 6/18/91, effective 9/18/91.]


WAC 173-460-090 Second tier review. (1) Applicability. An applicant who cannot demonstrate compliance with WAC

173-460-070 using an acceptable source impact level analysis as provi-ded in WAC 173-460-080, may submit a petition requesting that ecology perform a second tier review to determine a means of compliance with WAC 173-460-070. Petitions for second tier review must be submitted to ecology with a copy to the permitting authority with jurisdiction.

(2) Second tier petition submittal requirements. Ecology will evaluate a second tier petition only if:

(a) The permitting authority submits to ecology a preliminary or-der of approval that addresses all applicable new source review issues with the exception of the outcome of the second tier review, State En-vironmental Policy Act review, public notification, and prevention of significant deterioration review; and

(b) The emission controls contained in the preliminary order of approval represent at least tBACT; and

(c) The applicant has developed a health impact assessment proto-col that has been approved by ecology;

(d) The ambient impact of the emissions increase of each TAP that exceeds acceptable source impact levels has been quantified using re-fined air dispersion modeling techniques as approved in the health im-pact assessment protocol; and

(e) The petition contains a health impact assessment conducted in accordance with the approved health impact assessment protocol.Note: Contact ecology's air quality program for a copy of a guidance document to assist in the preparation of the health impact assessment protocol.

(3) Health impact assessment (HIA) protocol. The HIA presents da-ta about the new or modified source and its built and natural environ-ment. A HIA includes but is not limited to: Site description, TAP con-centrations and toxicity, identification of exposed populations and an exposure assessment. The HIA protocol must be reviewed and approved by ecology prior to development of the HIA.

(4) The health impact assessment must utilize current scientific information. New scientific information on the toxicological charac-teristics of toxic air pollutants may be used by ecology to justify modifications of risk-based concentrations.

(5) Background concentrations of TAPs will be considered as part of a second tier review. Background concentrations can be estimated using:

(a) The latest National Ambient Toxics Assessment data for the appropriate census tracts; or

(b) Ambient monitoring data for the project's location; or(c) Modeling of emissions of the TAPs subject to second tier re-

view from all stationary sources within 1.5 kilometers of the source location.

(6) Reduction of TAPs from existing emission units. For the pur-pose of offsetting emissions of a particular TAP, an applicant may propose reductions in actual emissions of that TAP from existing, un-modified emission units at the source or existing, unmodified emission units at other nearby sources. The health impact analysis must evalu-ate the benefits of the emission reductions. The reductions in TAP emissions authorized by this subsection must be included in an appro-val order as enforceable emission limits and must meet all require-ments of WAC 173-460-071.

(7) Approval criteria for second tier review. Ecology may recom-mend approval of a project that is likely to cause an exceedance of acceptable source impact levels for one or more TAPs only if it deter-


mines that the emission controls for the new and modified emission units represent tBACT and the applicant demonstrates that the increase in emissions of TAPs is not likely to result in an increased cancer risk of more than one in one hundred thousand and ecology determines that the noncancer hazard is found to be acceptable.

(8) Application processing. Within thirty days after receiving a second tier petition ecology must either notify the applicant in writ-ing that the application is complete or notify the applicant in writ-ing of all additional information required to make it complete.

(9) Public involvement. All notice of construction approval or-ders with a second tier component are subject to the public notice and comment requirements of WAC 173-400-171, which may be integrated with the permitting authority's public notice and comment procedures.

(10) Recommendation. Within sixty days of determining that a pe-tition is complete ecology must make a recommendation to the permit-ting authority.

(a) If ecology recommends approval of the second tier petition, the permitting authority may approve the notice of construction appli-cation. Any new emission limits or conditions specified by ecology must be incorporated into the approval order.

(b) If ecology recommends denial of the second tier petition, then the permitting authority may not approve the project.[Statutory Authority: Washington Clean Air Act, RCW 70.94.152. WSR 09-11-131 (Order 05-19), § 173-460-090, filed 5/20/09, effective 6/20/09. Statutory Authority: Chapter 70.94 RCW. WSR 94-03-072 (Order 93-19), § 173-460-090, filed 1/14/94, effective 2/14/94. Statutory Au-thority: RCW 70.94.331. WSR 91-13-079 (Order 90-62), § 173-460-090, filed 6/18/91, effective 9/18/91.]

WAC 173-460-100 Third tier review. (1) Applicability. An appli-cant for a project that exceeds the second tier review thresholds may submit a third tier petition requesting that the director of ecology approve the project based on a risk management analysis.

(2) Contents of the petition.The petition must meet the submittal requirements of WAC

173-460-090. The applicant may submit the request for a risk manage-ment decision concurrently with the second tier petition. Prior denial of a second tier petition submitted under WAC 173-460-090 is not re-quired.

(3) Criteria for approval. Ecology's director must find that the following conditions are met before approving a third tier petition:

(a) Proposed emission controls represent at least tBACT; and(b) A HIA has been completed as described in WAC 173-460-090(3);

and(c) Approval of the project will result in a greater environmen-

tal benefit to the state of Washington.(4) Additional methods to reduce toxic air pollutants. In addi-

tion to the requirements in subsection (3) of this section, the appli-cant may propose and ecology may consider measures that would reduce community exposure, especially exposure of that portion of the commun-ity subject to the greatest additional risk, to comparable toxic air pollutants provided that such measures are not already required.

(5) Application processing. Within thirty days of receiving a third tier petition ecology must determine if the petition includes the information required in WAC 173-460-090. If the petition is deemed


complete, ecology must begin substantive review. If the petition is deemed incomplete, ecology must give written notification to the ap-plicant of the information that is required to make the petition com-plete.

(6) Public involvement. Ecology will initiate public notice and comment within sixty days of determining that a third tier petition is complete. In addition to the public notice and comment requirements of WAC 173-400-171, the applicant must hold a public hearing to:

(a) Present the results of the health impact analysis, the pro-posed emission controls, pollution prevention methods, additional pro-posed measures, and remaining risks; and

(b) Participate in discussions and answer questions.(7) Recommendation.(a) If ecology recommends approval of the third tier petition,

the permitting authority may approve the notice of construction appli-cation. Any new emission limits or conditions specified by ecology must be incorporated into the approval order.

(b) If ecology recommends denial of the third tier petition then the permitting authority may not approve the project.[Statutory Authority: Washington Clean Air Act, RCW 70.94.152. WSR 09-11-131 (Order 05-19), § 173-460-100, filed 5/20/09, effective 6/20/09. Statutory Authority: Chapter 70.94 RCW. WSR 94-03-072 (Order 93-19), § 173-460-100, filed 1/14/94, effective 2/14/94. Statutory Au-thority: RCW 70.94.331. WSR 91-13-079 (Order 90-62), § 173-460-100, filed 6/18/91, effective 9/18/91.]

WAC 173-460-140 Remedies. Violations of this chapter are sub-ject to the penalty provisions and/or other remedies provided in chap-ter 70.94 RCW.[Statutory Authority: RCW 70.94.331. WSR 91-13-079 (Order 90-62), § 173-460-140, filed 6/18/91, effective 9/18/91.]

WAC 173-460-150 Table of ASIL, SQER and de minimis emission val-ues. The following table lists the common name of TAPs, the chemical abstract service (CAS) number; the averaging period; the acceptable source impact level (ASIL); the small quantity emission rate (SQER); and de minimis emission value.

Common Name CAS #Averaging

PeriodASIL

(µg/m3)

SQER(lb/averaging

period)

De Minimis (lb/averaging

period)Acetaldehyde 75-07-0 year 3.7E-01 6.0E+01 3.0E+00Acetamide 60-35-5 year 5.0E-02 8.1E+00 4.1E-01Acetonitrile 75-05-8 24-hr 6.0E+01 4.4E+00 2.2E-012-Acetylaminofluorene 53-96-3 year 4.6E-04 7.5E-02 3.8E-03Acrolein 107-02-8 24-hr 3.5E-01 2.6E-02 1.3E-03Acrylamide 79-06-1 year 6.0E-03 9.8E-01 4.9E-02Acrylic acid 79-10-7 24-hr 1.0E+00 7.4E-02 3.7E-03Acrylonitrile 107-13-1 year 3.4E-03 5.6E-01 2.8E-02Actinomycin D 50-76-0 year 4.0E-07 6.5E-05 3.2E-06Alar (daminsozide) 1596-84-5 year 2.0E-01 3.2E+01 1.6E+00Aldrin 309-00-2 year 2.0E-04 3.3E-02 1.7E-03Allyl chloride 107-05-1 year 1.7E-01 2.7E+01 1.4E+00



PeriodASIL

(µg/m3)

SQER(lb/averaging

period)


period)3-Amino-9-ethylcarbazole hydrochloride 6109-97-3 year 4.5E-02 7.4E+00 3.7E-012-Amino-3-methyl-9H-pyrido[2,3-b]indole 68006-83-7 year 2.9E-03 4.8E-01 2.4E-021-Amino-2-methylanthraquinone 82-28-0 year 2.3E-02 3.8E+00 1.9E-012-Amino-3-methylimidazo-[4,5-f]quinoline 76180-96-6 year 2.5E-03 4.1E-01 2.0E-022-Amino-5-(5-nitro-2-furyl)-1,3,4-thiadiazol 712-68-5 year 2.2E-04 3.5E-02 1.8E-03A-alpha-c(2-amino-9h-pyrido[2,3-b]indole) 26148-68-5 year 8.7E-03 1.4E+00 7.1E-022-Aminoanthraquinone 117-79-3 year 6.4E-02 1.0E+01 5.2E-01o-Aminoazotoluene 97-56-3 year 9.1E-04 1.5E-01 7.4E-034-Aminobiphenyl 92-67-1 year 1.7E-04 2.7E-02 1.4E-03Amitrole 61-82-5 year 3.7E-03 6.0E-01 3.0E-02Ammonia 7664-41-7 24-hr 5.0E+02 3.7E+01 1.9E+00Ammonium bisulfate 7803-63-6 1-hr 1.2E+02 2.2E-01 1.1E-02Aniline 62-53-3 year 6.3E-01 1.0E+02 5.1E+00o-Anisidine 90-04-0 year 2.5E-02 4.1E+00 2.0E-01o-Anisidine hydrochloride 134-29-2 year 3.2E-02 5.2E+00 2.6E-01Antimony trioxide 1309-64-4 24-hr 2.0E-01 1.5E-02 7.4E-04Aramite 140-57-8 year 1.2E-01 1.9E+01 9.4E-01Tris(1-aziridinyl)phosphine sulfide 52-24-4 year 2.9E-04 4.8E-02 2.4E-03Arsenic & inorganic arsenic compounds, NOS — year 3.0E-04 4.9E-02 2.5E-03Arsine 7784-42-1 24-hr 1.5E-02 1.1E-03 5.6E-05Asbestos (fibers/cubic centimeter) 1332-21-4 year 4.3E-06 7.1E-04 3.5E-05Actinolite asbestos (fibers/cubic centimeter) 12172-67-7 year 4.3E-06 7.1E-04 3.5E-05Amosite asbestos (fibers/cubic centimeter) 12172-73-5 year 4.3E-06 7.1E-04 3.5E-05Anthophylite asbestos (fibers/cubic centimeter) 17068-78-9 year 4.3E-06 7.1E-04 3.5E-05Chrysotile asbestos (fibers/cubic centimeter) 12001-29-5 year 4.3E-06 7.1E-04 3.5E-05Crocidolite asbestos (fibers/cubic centimeter) 12001-28-4 year 4.3E-06 7.1E-04 3.5E-05Libby amphibole asbestos and amphiboles, NOS (fibers/cubic centimeter)

— year 5.9E-06 9.6E-04 4.8E-05

Tremolite asbestos (fibers/cubic centimeter) 14567-73-8 year 4.3E-06 7.1E-04 3.5E-05Auramine 492-80-8 year 4.0E-03 6.5E-01 3.2E-02Azaserine 115-02-6 year 3.2E-04 5.2E-02 2.6E-03Azathioprine 446-86-6 year 2.0E-03 3.2E-01 1.6E-02Azobenzene 103-33-3 year 3.2E-02 5.2E+00 2.6E-01Barium chromate 10294-40-3 year 2.0E-05 3.2E-03 1.6E-04Benz[a]anthracene 56-55-3 year 5.5E-03 8.9E-01 4.5E-02Benzene 71-43-2 year 1.3E-01 2.1E+01 1.0E+00Benzidine 92-87-5 year 4.3E-06 7.0E-04 3.5E-05Benzo[a]pyrene 50-32-8 year 1.0E-03 1.6E-01 8.2E-03Benzo[b]fluoranthene 205-99-2 year 5.5E-03 8.9E-01 4.5E-02Benzo[j]fluoranthene 205-82-3 year 5.5E-03 8.9E-01 4.5E-02Benzo[k]fluoranthene 207-08-9 year 5.5E-03 8.9E-01 4.5E-02Benzyl chloride 100-44-7 year 2.0E-02 3.3E+00 1.7E-01Benzyl violet 4B 1694-09-3 year 1.8E-01 2.8E+01 1.4E+00Beryllium & compounds, NOS — year 4.2E-04 6.8E-02 3.4E-03Beryllium oxide 1304-56-9 year 4.2E-04 6.8E-02 3.4E-03Beryllium sulfate 13510-49-1 year 1.2E-06 1.9E-04 9.4E-06beta-Butyrolactone 3068-88-0 year 3.4E-03 5.6E-01 2.8E-02beta-Propiolactone 57-57-8 year 2.5E-04 4.1E-02 2.0E-03Bis(2-chloroethyl) ether 111-44-4 year 1.4E-03 2.3E-01 1.1E-02Bis(chloromethyl) ether 542-88-1 year 7.7E-05 1.2E-02 6.2E-04Boron & compounds, NOS — 24-hr 3.0E+02 2.2E+01 1.1E+00Bromobenzene 108-86-1 24-hr 6.0E+01 4.4E+00 2.2E-01



PeriodASIL

(µg/m3)

SQER(lb/averaging

period)


period)Bromodichloromethane 75-27-4 year 2.7E-02 4.4E+00 2.2E-01Bromoform 75-25-2 year 9.1E-01 1.5E+02 7.4E+00Bromomethane (methyl bromide) 74-83-9 24-hr 5.0E+00 3.7E-01 1.9E-021-Bromopropane 106-94-5 24-hr 1.0E+02 7.4E+00 3.7E-011,3-Butadiene 106-99-0 year 3.3E-02 5.4E+00 2.7E-01Butylated hydroxyanisole 25013-16-5 year 1.8E+01 2.8E+03 1.4E+02C.I. basic red 9 monohydrochloride 569-61-9 year 1.4E-02 2.3E+00 1.1E-01Cadmium & compounds, NOS — year 2.4E-04 3.9E-02 1.9E-03Caprolactam 105-60-2 24-hr 2.2E+00 1.6E-01 8.2E-03Captafol 2425-06-1 year 2.3E-02 3.8E+00 1.9E-01Captan 133-06-2 year 1.5E+00 2.5E+02 1.2E+01Carbon disulfide 75-15-0 24-hr 8.0E+02 5.9E+01 3.0E+00Carbon monoxide 630-08-0 1-hr 2.3E+04 4.3E+01 1.1E+00Carbon tetrachloride 56-23-5 year 1.7E-01 2.7E+01 1.4E+00Carbonyl sulfide 463-58-1 24-hr 1.0E+01 7.4E-01 3.7E-02Cerium oxide 1306-38-3 24-hr 9.0E-01 6.7E-02 3.3E-03Chlorambucil 305-03-3 year 7.7E-06 1.2E-03 6.2E-05Chlordane 57-74-9 year 1.0E-02 1.6E+00 8.1E-02Chlordecone 143-50-0 year 2.2E-04 3.5E-02 1.8E-03Chlorendic acid 115-28-6 year 3.8E-02 6.2E+00 3.1E-01Chlorinated paraffins 108171-26-2 year 4.0E-02 6.5E+00 3.2E-01Chlorine 7782-50-5 24-hr 1.5E-01 1.1E-02 5.6E-04Chlorine dioxide 10049-04-4 24-hr 6.0E-01 4.4E-02 2.2E-031-Chloro-1,1-difluoroethane 75-68-3 24-hr 5.0E+04 3.7E+03 1.9E+023-Chloro-2-methyl-1-propene 563-47-3 year 2.5E-02 4.1E+00 2.0E-012-Chloroacetophenone 532-27-4 24-hr 3.0E-02 2.2E-03 1.1E-04Chloroalkanes C10-13 (chlorinated paraffins) 85535-84-8 year 4.0E-02 6.5E+00 3.2E-01Chlorobenzene 108-90-7 24-hr 1.0E+03 7.4E+01 3.7E+00Chlorobenzilate 510-15-6 year 3.2E-02 5.2E+00 2.6E-01Chlorodifluoromethane (Freon 22) 75-45-6 24-hr 5.0E+04 3.7E+03 1.9E+02Chloroethane (ethyl chloride) 75-00-3 24-hr 3.0E+04 2.2E+03 1.1E+02Chloroform 67-66-3 year 4.3E-02 7.1E+00 3.5E-01Chloromethane (methyl chloride) 74-87-3 24-hr 9.0E+01 6.7E+00 3.3E-01Chloromethyl methyl ether 107-30-2 year 1.4E-03 2.4E-01 1.2E-024-Chloro-o-phenylenediamine 95-83-0 year 2.2E-01 3.5E+01 1.8E+00p-Chloro-o-toluidine 95-69-2 year 1.3E-02 2.1E+00 1.1E-01Chloropicrin 76-06-2 24-hr 4.0E-01 3.0E-02 1.5E-03Chloroprene 126-99-8 year 2.0E-03 3.3E-01 1.6E-02Chlorothalonil 1897-45-6 year 1.1E+00 1.8E+02 9.1E+00Chlorozotocin 54749-90-5 year 1.4E-05 2.4E-03 1.2E-04Chromic trioxide 1333-82-0 year 7.7E-06 1.3E-03 6.3E-05Chromic(VI) acid 7738-94-5 year 9.1E-06 1.5E-03 7.4E-05Chromium(III), insoluble particulates, NOS — 24-hr 5.0E+00 3.7E-01 1.9E-02Chromium(III), soluble particulates, NOS — 24-hr 1.0E-01 7.4E-03 3.7E-04Chromium(VI) & compounds, NOS — year 4.0E-06 6.5E-04 3.3E-05Chrysene 218-01-9 year 5.5E-02 8.9E+00 4.5E-01Cinnamyl anthranilate 87-29-6 year 7.7E-01 1.2E+02 6.2E+00Cobalt and compounds, NOS 7440-48-4 24-hr 1.0E-01 7.4E-03 3.7E-04Coke oven emissions — year 9.7E-04 1.6E-01 7.9E-03Copper & compounds — 1-hr 1.0E+02 1.9E-01 9.3E-03p-Cresidine 120-71-8 year 2.3E-02 3.8E+00 1.9E-01Cresols (mixture), including m-cresol, o-cresol, p-cresol 1319-77-3 24-hr 6.0E+02 4.4E+01 2.2E+00



PeriodASIL

(µg/m3)

SQER(lb/averaging

period)


period)m-Cresol (3-methylphenol) 108-39-4 24-hr 6.0E+02 4.4E+01 2.2E+00o-Cresol (2-methylphenol) 95-48-7 24-hr 6.0E+02 4.4E+01 2.2E+00p-Cresol (4-methylphenol) 106-44-5 24-hr 6.0E+02 4.4E+01 2.2E+00Cumene 98-82-8 24-hr 4.0E+02 3.0E+01 1.5E+00Cupferron 135-20-6 year 1.6E-02 2.6E+00 1.3E-01Cyclohexane 110-82-7 24-hr 6.0E+03 4.4E+02 2.2E+01Cyclophosphamide (anhydrous) 50-18-0 year 5.9E-03 9.6E-01 4.8E-02Cyclophosphamide (hydrated) 6055-19-2 year 6.3E-03 1.0E+00 5.1E-02D & C red no. 9 5160-02-1 year 6.7E-01 1.1E+02 5.4E+00Dacarbazine 4342-03-4 year 7.1E-05 1.2E-02 5.8E-04Dantron 117-10-2 year 4.5E-02 7.4E+00 3.7E-01Di(2-ethylhexl)phthalate 117-81-7 year 4.2E-01 6.8E+01 3.4E+002,4-Diaminoanisole 615-05-4 year 1.5E-01 2.5E+01 1.2E+002,4-Diaminoanisole sulfate 39156-41-7 year 2.7E-01 4.4E+01 2.2E+004,4'-Diaminodiphenyl ether 101-80-4 year 2.5E-02 4.1E+00 2.0E-012,4-Diaminotoluene (2,4-toluene diamine) 95-80-7 year 9.1E-04 1.5E-01 7.4E-03Diazinon 333-41-5 24-hr 1.0E+01 7.4E-01 3.7E-02Dibenz[a,h]acridine 226-36-8 year 5.5E-03 8.9E-01 4.5E-02Dibenz[a,h]anthracene 53-70-3 year 5.0E-04 8.2E-02 4.1E-03Dibenz[a,j]acridine 224-42-0 year 5.5E-03 8.9E-01 4.5E-02Dibenzo[a,e]pyrene 192-65-4 year 5.5E-04 8.9E-02 4.5E-03Dibenzo[a,h]pyrene 189-64-0 year 5.5E-05 8.9E-03 4.5E-04Dibenzo[a,i]pyrene 189-55-9 year 5.5E-05 8.9E-03 4.5E-04Dibenzo[a,l]pyrene 191-30-0 year 5.5E-05 8.9E-03 4.5E-047H-Dibenzo[c,g]carbazole 194-59-2 year 5.5E-04 8.9E-02 4.5E-031,2-Dibromo-3-chloropropane (DBCP) 96-12-8 year 3.2E-04 5.2E-02 2.6E-03Tris(2,3-dibromopropyl)phosphate 126-72-7 year 1.5E-03 2.5E-01 1.2E-021,4-Dichlorobenzene 106-46-7 year 9.1E-02 1.5E+01 7.4E-013,3'-Dichlorobenzidine 91-94-1 year 2.9E-03 4.8E-01 2.4E-02DDD (dichlorodiphenyldichloroethane) 72-54-8 year 1.4E-02 2.4E+00 1.2E-01DDE (dichlorodiphenyldichloroethylene) 72-55-9 year 1.0E-02 1.7E+00 8.4E-02DDT(dichlorodiphenyltrichloroethane) 50-29-3 year 1.0E-02 1.7E+00 8.4E-021,1-Dichloroethane (ethylidene dichloride) 75-34-3 year 6.3E-01 1.0E+02 5.1E+00trans-1,2-Dichloroethene 156-60-5 24-hr 8.1E+02 6.0E+01 3.0E+001,1-Dichloroethylene (1,1-DCE) 75-35-4 24-hr 2.0E+02 1.5E+01 7.4E-01Dichloromethane 75-09-2 year 6.0E+01 9.8E+03 4.9E+021,2-Dichloropropane (propylene dichloride) 78-87-5 year 1.0E-01 1.6E+01 8.1E-011,3-Dichloropropene 542-75-6 year 2.5E-01 4.1E+01 2.0E+002,3-Dichloropropene 78-88-6 24-hr 9.2E+00 6.8E-01 3.4E-02Dichlorvos (DDVP) 62-73-7 year 1.2E-02 2.0E+00 9.8E-02Dieldrin 60-57-1 year 2.2E-04 3.5E-02 1.8E-03Diesel engine exhaust, particulate — year 3.3E-03 5.4E-01 2.7E-02Diethanolamine 111-42-2 24-hr 3.0E+00 2.2E-01 1.1E-02Diethylstilbestrol 56-53-1 year 1.0E-05 1.6E-03 8.1E-051,1-Difluoroethane 75-37-6 24-hr 4.0E+04 3.0E+03 1.5E+02Diglycidyl resorcinol ether 101-90-6 year 2.0E-03 3.3E-01 1.7E-02Dihydrosafrole 94-58-6 year 7.7E-02 1.2E+01 6.2E-014-Dimethylaminoazobenzene 60-11-7 year 7.7E-04 1.2E-01 6.2E-03trans-2[(dimethylamino)-methylimino]-5-[2-(5-nitro-2-furyl)-vinyl]-1,3,4-oxadiazole

55738-54-0 year 7.7E-03 1.2E+00 6.2E-02

7,12-Dimethylbenz[a]anthracene 57-97-6 year 8.5E-06 1.4E-03 6.9E-05Dimethyl carbamoyl chloride 79-44-7 year 2.7E-04 4.4E-02 2.2E-03



PeriodASIL

(µg/m3)

SQER(lb/averaging

period)


period)1,1-Dimethylhydrazine 57-14-7 24-hr 5.0E-01 3.7E-02 1.9E-031,2-Dimethylhydrazine 540-73-8 year 6.3E-06 1.0E-03 5.1E-05Dimethylvinylchloride 513-37-1 year 7.7E-02 1.2E+01 6.2E-011,6-Dinitropyrene 42397-64-8 year 5.5E-05 8.9E-03 4.5E-041,8-Dinitropyrene 42397-65-9 year 5.5E-04 8.9E-02 4.5E-032,4-Dinitrotoluene 121-14-2 year 1.1E-02 1.8E+00 9.1E-021,4-Dioxane 123-91-1 year 2.0E-01 3.2E+01 1.6E+001,2-Diphenylhydrazine (hydrazobenzene) 122-66-7 year 4.0E-03 6.5E-01 3.2E-02Direct black 38 1937-37-7 year 4.8E-04 7.7E-02 3.9E-03Direct blue 6 2602-46-2 year 4.8E-04 7.7E-02 3.9E-03Direct brown 95 16071-86-6 year 5.3E-04 8.5E-02 4.3E-03Disperse blue 1 2475-45-8 year 7.7E-01 1.2E+02 6.2E+00Disulfoton 298-04-4 24-hr 2.0E-01 1.5E-02 7.4E-04Epichlorohydrin 106-89-8 year 4.3E-02 7.1E+00 3.5E-011,2-Epoxybutane 106-88-7 24-hr 2.0E+01 1.5E+00 7.4E-02Estradiol 17B 50-28-2 year 9.1E-05 1.5E-02 7.4E-04Ethyl benzene 100-41-4 year 4.0E-01 6.5E+01 3.2E+00Ethyl carbamate (urethane) 51-79-6 year 2.1E-03 3.4E-01 1.7E-02Ethylene dibromide (EDB, 1,2-dibromoethane) 106-93-4 year 1.7E-03 2.7E-01 1.4E-02Ethylene dichloride (EDC, 1,2-dichloroethane) 107-06-2 year 3.8E-02 6.2E+00 3.1E-01Ethylene glycol 107-21-1 24-hr 4.0E+02 3.0E+01 1.5E+00Ethylene glycol monobutyl ether 111-76-2 24-hr 8.2E+01 6.1E+00 3.0E-01Ethylene glycol monoethyl ether (2-ethoxyethanol) 110-80-5 24-hr 7.0E+01 5.2E+00 2.6E-01Ethylene glycol monoethyl ether acetate 111-15-9 24-hr 3.0E+02 2.2E+01 1.1E+00Ethylene glycol monomethyl ether (2-methoxyethanol) 109-86-4 24-hr 6.0E+01 4.4E+00 2.2E-01Ethylene glycol monomethyl ether acetate 110-49-6 24-hr 9.0E+01 6.7E+00 3.3E-01Ethylene oxide 75-21-8 year 2.0E-04 3.3E-02 1.6E-03Ethylene thiourea 96-45-7 year 7.7E-02 1.2E+01 6.2E-01Ethyleneimine 151-56-4 year 5.3E-05 8.5E-03 4.3E-04Ferric sulfate 10028-22-5 1-hr 1.2E+02 2.2E-01 1.1E-02Fluorides (fluoride containing chemicals), NOS — 24-hr 1.3E+01 9.6E-01 4.8E-02Fluorine gas F2 7782-41-4 24-hr 1.6E+01 1.2E+00 5.9E-02

Formaldehyde 50-00-0 year 1.7E-01 2.7E+01 1.4E+00Furmecyclox 60568-05-0 year 1.2E-01 1.9E+01 9.4E-01Furylfuramide 3688-53-7 year 1.4E-02 2.4E+00 1.2E-01Glu-P-1 67730-11-4 year 7.1E-04 1.2E-01 5.8E-03Glu-P-2 67730-10-3 year 2.5E-03 4.1E-01 2.0E-02Glutaraldehyde 111-30-8 24-hr 8.0E-02 5.9E-03 3.0E-04Guthion (azinphos-methyl) 86-50-0 24-hr 1.0E+01 7.4E-01 3.7E-02Gyromitrin 16568-02-8 year 3.4E-04 5.6E-02 2.8E-03HC blue 1 2784-94-3 year 6.7E-02 1.1E+01 5.4E-01Heptachlor 76-44-8 year 7.7E-04 1.2E-01 6.2E-03Heptachlor epoxide 1024-57-3 year 3.8E-04 6.2E-02 3.1E-03Heptachlorodibenzo-p-dioxin, NOS 37871-00-4 year 2.6E-06 4.3E-04 2.1E-05Hexachlorobenzene 118-74-1 year 2.2E-03 3.5E-01 1.8E-02Hexachlorobutadiene 87-68-3 year 4.5E-02 7.4E+00 3.7E-01Hexachlorocyclohexane 608-73-1 year 9.1E-04 1.5E-01 7.4E-03alpha-Hexachlorocyclohexane 319-84-6 year 1.3E-03 2.1E-01 1.1E-02beta-Hexachlorocyclohexane 319-85-7 year 2.3E-03 3.8E-01 1.9E-02gamma-Hexachlorocyclohexane (lindane) 58-89-9 year 3.2E-03 5.2E-01 2.6E-02Hexachlorocyclopentadiene 77-47-4 24-hr 2.0E-01 1.5E-02 7.4E-04Hexachlorodibenzo-p-dioxins, NOS 34465-46-8 year 2.6E-07 4.3E-05 2.1E-06



PeriodASIL

(µg/m3)

SQER(lb/averaging

period)


period)Hexachloroethane 67-72-1 year 9.1E-02 1.5E+01 7.4E-01Hexamethylene diisocyanate 822-06-0 24-hr 7.0E-02 5.2E-03 2.6E-04n-Hexane 110-54-3 24-hr 7.0E+02 5.2E+01 2.6E+002-Hexanone 591-78-6 24-hr 3.0E+01 2.2E+00 1.1E-01Hydrazine 302-01-2 year 2.0E-04 3.3E-02 1.7E-03Hydrazine sulfate 10034-93-2 year 1.2E-03 1.9E-01 9.4E-03Hydrogen chloride 7647-01-0 24-hr 9.0E+00 6.7E-01 3.3E-02Hydrogen cyanide 74-90-8 24-hr 8.0E-01 5.9E-02 3.0E-03Hydrogen fluoride 7664-39-3 24-hr 1.4E+01 1.0E+00 5.2E-02Hydrogen sulfide 7783-06-4 24-hr 2.0E+00 1.5E-01 7.4E-03Indeno[1,2,3-cd]pyrene 193-39-5 year 5.5E-03 8.9E-01 4.5E-02Isophorone 78-59-1 24-hr 2.0E+03 1.5E+02 7.4E+00Isopropyl alcohol 67-63-0 1-hr 3.2E+03 5.9E+00 3.0E-01Lasiocarpine 303-34-4 year 4.5E-04 7.4E-02 3.7E-03Lead & compounds, NOS — year 8.3E-02 1.4E+01 1.0E+01Lead acetate 301-04-2 year 1.3E-02 2.0E+00 1.0E-01Lead chromate oxide 18454-12-1 year 4.2E-05 6.9E-03 3.4E-04Lead chromate 7758-97-6 year 2.5E-05 4.1E-03 2.0E-04Lead phosphate 7446-27-7 year 8.3E-02 1.4E+01 6.8E-01Lead subacetate 1335-32-6 year 9.1E-02 1.5E+01 7.4E-01Malathion 121-75-5 24-hr 2.0E+01 1.5E+00 7.4E-02Maleic anhydride 108-31-6 24-hr 7.0E-01 5.2E-02 2.6E-03Manganese & compounds — 24-hr 3.0E-01 2.2E-02 1.1E-03Melphalan 148-82-3 year 2.7E-05 4.4E-03 2.2E-04Mercury, elemental 7439-97-6 24-hr 3.0E-02 2.2E-03 1.1E-04Diethyl mercury 627-44-1 24-hr 1.4E-01 1.0E-02 5.2E-04Dimethyl mercury 593-74-8 24-hr 1.4E-01 1.0E-02 5.2E-04Methyl alchohol (methanol) 67-56-1 24-hr 2.0E+04 1.5E+03 7.4E+013-Methylcholanthrene 56-49-5 year 9.6E-05 1.6E-02 7.8E-045-Methylchrysene 3697-24-3 year 5.5E-04 8.9E-02 4.5E-034,4'-Methylenebis(2-chloroaniline) (MOCA) 101-14-4 year 1.4E-03 2.3E-01 1.1E-024,4'-Methylenebis(2-methylaniline) 838-88-0 year 3.8E-03 6.2E-01 3.1E-024,4'-Methylenebis(N,N'-dimethyl)aniline 101-61-1 year 7.7E-02 1.2E+01 6.2E-014,4'-Methylenedianiline 101-77-9 year 2.2E-03 3.5E-01 1.8E-024,4'-Methylenedianiline dihydrochloride 13552-44-8 year 2.2E-03 3.5E-01 1.8E-02Methylene diphenyl diisocyanate (MDI) 101-68-8 24-hr 8.0E-02 5.9E-03 3.0E-04Methyl ethyl ketone 78-93-3 24-hr 5.0E+03 3.7E+02 1.9E+01Methyl isobutyl ketone (MIBK, hexone) 108-10-1 24-hr 3.0E+03 2.2E+02 1.1E+01Methyl isocyanate 624-83-9 24-hr 1.0E+00 7.4E-02 3.7E-03Methyl methacrylate 80-62-6 24-hr 7.0E+02 5.2E+01 2.6E+00Methyl methanesulfonate 66-27-3 year 3.6E-02 5.8E+00 2.9E-012-Methyl-1-nitroanthraquinone 129-15-7 year 8.3E-04 1.4E-01 6.8E-03N-Methyl-N-nitro-N-nitrosoguanidine 70-25-7 year 4.2E-04 6.8E-02 3.4E-03Methyl tert-butyl ether 1634-04-4 year 3.8E+00 6.2E+02 3.1E+01Methylthiouracil 56-04-2 year 9.1E-03 1.5E+00 7.4E-02Michler's ketone 90-94-8 year 4.0E-03 6.5E-01 3.2E-02Mirex 2385-85-5 year 2.0E-04 3.2E-02 1.6E-03Mitomycin C 50-07-7 year 4.3E-07 7.1E-05 3.5E-06Monocrotaline 315-22-0 year 3.4E-04 5.6E-02 2.8E-03N,N-Dimethylformamide 68-12-2 24-hr 8.0E+01 5.9E+00 3.0E-01Naphthalene 91-20-3 year 2.9E-02 4.8E+00 2.4E-012-Naphthylamine 91-59-8 year 2.0E-03 3.2E-01 1.6E-02



PeriodASIL

(µg/m3)

SQER(lb/averaging

period)


period)Nickel & compounds, NOS — year 3.8E-03 6.2E-01 3.1E-02Nickel acetate 373-02-4 year 1.2E-02 1.9E+00 9.4E-02Nickel carbonate 3333-67-3 year 7.8E-03 1.3E+00 6.3E-02Nickel carbonate hydroxide 12607-70-4 year 6.6E-03 1.1E+00 5.4E-02Nickel carbonyl 13463-39-3 year 1.1E-02 1.8E+00 9.1E-02Nickel chloride 7718-54-9 year 8.5E-03 1.4E+00 6.9E-02Nickel hydroxide 12054-48-7 year 6.1E-03 9.9E-01 4.9E-02Nickel nitrate hexahydrate 13478-00-7 year 1.9E-02 3.1E+00 1.5E-01Nickel oxide (nickel monoxide, nickel(II) oxide) 1313-99-1 year 4.9E-03 7.9E-01 4.0E-02Nickel oxide black (nickel sesquioxide, nickel(III) oxide) 1314-06-3 year 5.4E-03 8.8E-01 4.4E-02Nickel refinery dust — year 4.2E-03 6.8E-01 3.4E-02Nickel subsulfide 12035-72-2 year 2.1E-03 3.4E-01 1.7E-02Nickel sulfate 7786-81-4 year 1.0E-02 1.6E+00 8.2E-02Nickel sulfate hexahydrate 10101-97-0 year 1.7E-02 2.8E+00 1.4E-01Nickel sulfide 11113-75-0 year 6.0E-03 9.7E-01 4.8E-02Nickelocene 1271-28-9 year 1.2E-02 2.0E+00 1.0E-01Nifurthiazole 3570-75-0 year 1.5E-03 2.5E-01 1.2E-02Nitric acid 7697-37-2 1-hr 8.6E+01 1.6E-01 8.0E-03Nitrilotriacetic acid 139-13-9 year 6.7E-01 1.1E+02 5.4E+00Nitrilotriacetic acid, trisodium salt monohydrate 18662-53-8 year 3.4E-01 5.6E+01 2.8E+00Nitrobenzene 98-95-3 year 2.5E-02 4.1E+00 2.0E-01Nitrofen 1836-75-5 year 4.3E-02 7.1E+00 3.5E-012-Nitrofluorene 607-57-8 year 5.5E-02 8.9E+00 4.5E-01Nitrofurazone 59-87-0 year 2.7E-03 4.4E-01 2.2E-021-[(5-Nitrofurfurylidene)-amino]-2-imidazolidinone 555-84-0 year 2.0E-03 3.2E-01 1.6E-02N-[4-(5-nitro-2-furyl)-2-thiazolyl]-acetamide 531-82-8 year 2.3E-03 3.8E-01 1.9E-02Nitrogen dioxide 10102-44-0 1-hr 4.7E+02 8.7E-01 4.6E-012-Nitropropane 79-46-9 24-hr 2.0E+01 1.5E+00 7.4E-021-Nitropyrene 5522-43-0 year 5.5E-03 8.9E-01 4.5E-024-Nitropyrene 57835-92-4 year 5.5E-03 8.9E-01 4.5E-025-Nitroacenaphthene 602-87-9 year 1.6E-02 2.6E+00 1.3E-016-Nitrochrysene 7496-02-8 year 5.5E-05 8.9E-03 4.5E-04N-Nitrosodiethanolamine 1116-54-7 year 1.3E-03 2.0E-01 1.0E-02N-Nitrosodiethylamine 55-18-5 year 6.0E-05 1.0E-02 4.9E-04N-Nitrosodimethylamine 62-75-9 year 1.3E-04 2.1E-02 1.1E-03N-Nitrosodi-N-butylamine 924-16-3 year 3.2E-04 5.2E-02 2.6E-03N-Nitrosodi-N-propylamine 621-64-7 year 5.0E-04 8.1E-02 4.1E-03N-Nitrosodiphenylamine 86-30-6 year 3.8E-01 6.2E+01 3.1E+00p-Nitrosodiphenylamine 156-10-5 year 1.6E-01 2.6E+01 1.3E+00N-Nitrosomorpholine 59-89-2 year 5.3E-04 8.5E-02 4.3E-03N-Nitroso-N-ethylurea 759-73-9 year 7.8E-05 1.3E-02 6.4E-04N-Nitroso-N-methylethylamine 10595-95-6 year 1.6E-04 2.6E-02 1.3E-03N-Nitroso-N-methylurea 684-93-5 year 1.8E-05 2.9E-03 1.4E-04N-Nitroso-N-methylurethane 615-53-2 year 3.2E-05 5.2E-03 2.6E-04N-Nitrosonornicotine 16543-55-8 year 2.5E-03 4.1E-01 2.0E-02N-Nitrosopiperidine 100-75-4 year 3.7E-04 6.0E-02 3.0E-03N-Nitrosopyrrolidine 930-55-2 year 1.7E-03 2.7E-01 1.4E-02Oleum 8014-95-7 1-hr 1.2E+02 2.2E-01 1.1E-02Ozone 10028-15-6 1-hr 1.8E+02 3.3E-01 2.0E-02Parathion 56-38-2 24-hr 2.0E-05 1.5E-06 7.4E-08Pentachlorophenol 87-86-5 year 2.2E-01 3.5E+01 1.8E+00Perchloroethylene 127-18-4 year 1.6E-01 2.7E+01 1.3E+00



PeriodASIL

(µg/m3)

SQER(lb/averaging

period)


period)Phenacetin 62-44-2 year 1.6E+00 2.6E+02 1.3E+01Phenazopyridine 94-78-0 year 2.0E-02 3.3E+00 1.7E-01Phenazopyridine hydrochloride 136-40-3 year 2.3E-02 3.8E+00 1.9E-01Phenesterin 3546-10-9 year 2.3E-05 3.8E-03 1.9E-04Phenobarbital 50-06-6 year 7.7E-03 1.2E+00 6.2E-02Phenol 108-95-2 24-hr 2.0E+02 1.5E+01 7.4E-01Phenoxybenzamine 59-96-1 year 1.1E-03 1.8E-01 9.1E-03Phenoxybenzamine hydrochloride 63-92-3 year 1.3E-03 2.1E-01 1.1E-02o-Phenylphenate, sodium 132-27-4 year 1.2E+00 1.9E+02 9.4E+00Phosgene 75-44-5 24-hr 3.0E-01 2.2E-02 1.1E-03Phosphine 7803-51-2 24-hr 8.0E-01 5.9E-02 3.0E-03Phosphoric acid 7664-38-2 24-hr 7.0E+00 5.2E-01 2.6E-02Phosphorus 7723-14-0 24-hr 2.0E+01 1.5E+00 7.4E-02Phosphorus, white 12185-10-3 24-hr 2.0E+01 1.5E+00 7.4E-02Phthalic anhydride 85-44-9 24-hr 2.0E+01 1.5E+00 7.4E-02Polybrominated biphenyls — year 1.2E-04 1.9E-02 9.4E-04Polybrominated diphenyl ethers (PBDEs) [containing less than 10 bromine atoms]

— 24-hr 6.0E+00 4.4E-01 2.2E-02

Polychlorinated biphenyls (PCBs), NOS 1336-36-3 year 1.8E-03 2.8E-01 1.4E-02PCB 77 (3,3',4,4'-tetrachlorobiphenyl) 32598-13-3 year 2.6E-04 4.3E-02 2.1E-03PCB 81 (3,4,4',5-tetrachlorobiphenyl) 70362-50-4 year 9.1E-05 1.5E-02 7.4E-04PCB 105 (2,3,3',4,4'-pentachlorobiphenyl) 32598-14-4 year 9.1E-04 1.5E-01 7.4E-03PCB 114 (2,3,4,4',5-pentachlorobiphenyl) 74472-37-0 year 9.1E-04 1.5E-01 7.4E-03PCB 118 (2,3',4,4',5-pentachlorobiphenyl) 31508-00-6 year 9.1E-04 1.5E-01 7.4E-03PCB 123 (2,3',4,4',5'-pentachlorobiphenyl) 65510-44-3 year 9.1E-04 1.5E-01 7.4E-03PCB 126 (3,3',4,4',5-pentachlorobiphenyl) 57465-28-8 year 2.6E-07 4.3E-05 2.1E-06PCB 156 (2,3,3',4,4',5-hexachlorobiphenyl) 38380-08-4 year 9.1E-04 1.5E-01 7.4E-03PCB 157 (2,3,3',4,4',5'-hexachlorobiphenyl) 69782-90-7 year 9.1E-04 1.5E-01 7.4E-03PCB 167 (2,3',4,4',5,5'-hexachlorobiphenyl) 52663-72-6 year 9.1E-04 1.5E-01 7.4E-03PCB 169 (3,3',4,4',5,5'-hexachlorobiphenyl) 32774-16-6 year 9.1E-07 1.5E-04 7.4E-06PCB 189 (2,3,3',4,4',5,5'-heptachlorobiphenyl) 39635-31-9 year 9.1E-04 1.5E-01 7.4E-031,2,3,4,6,7,8-Heptachlorodibenzo-p-dioxin (HpCDD) 35822-46-9 year 2.6E-06 4.3E-04 2.1E-051,2,3,4,7,8-Hexachlorodibenzo-p-dioxin (HxCDD) 39227-28-6 year 2.6E-07 4.3E-05 2.1E-061,2,3,6,7,8-Hexachlorodibenzo-p-dioxin (HxCDD) 57653-85-7 year 2.6E-07 4.3E-05 2.1E-061,2,3,7,8,9-Hexachlorodibenzo-p-dioxin (HxCDD) 19408-74-3 year 2.6E-07 4.3E-05 2.1E-061,2,3,4,6,7,8,9-Octachlorodibenzo-p-dioxin (OCDD) 3268-87-9 year 9.1E-05 1.5E-02 7.4E-041,2,3,7,8-Pentachlorodibenzo-p-dioxin (PeCDD) 40321-76-4 year 2.6E-08 4.3E-06 2.1E-072,3,7,8-Tetrachlorodibenzo-p-dioxin (TCDD) 1746-01-6 year 2.6E-08 4.3E-06 2.1E-072,3,7,8-Tetrachlorodibenzo-p-dioxin & related compounds, NOS

— year 2.6E-08 4.3E-06 2.1E-07

1,2,3,4,6,7,8-Heptachlorodibenzofuran (HpCDF) 67562-39-4 year 2.6E-06 4.3E-04 2.1E-051,2,3,4,7,8,9-Heptachlorodibenzofuran (HpCDF) 55673-89-7 year 2.6E-06 4.3E-04 2.1E-051,2,3,4,7,8-Hexachlorodibenzofuran (HxCDF) 70648-26-9 year 2.6E-07 4.3E-05 2.1E-061,2,3,6,7,8-Hexachlorodibenzofuran (HxCDF) 57117-44-9 year 2.6E-07 4.3E-05 2.1E-061,2,3,7,8,9-Hexachlorodibenzofuran (HxCDF) 72918-21-9 year 2.6E-07 4.3E-05 2.1E-062,3,4,6,7,8-Hexachlorodibenzofuran (HxCDF) 60851-34-5 year 2.6E-07 4.3E-05 2.1E-061,2,3,4,6,7,8,9-Octachlorodibenzofuran (OCDF) 39001-02-0 year 9.1E-05 1.5E-02 7.4E-041,2,3,7,8-Pentachlorodibenzofuran (PeCDF) 57117-41-6 year 9.1E-07 1.5E-04 7.4E-062,3,4,7,8-Pentachlorodibenzofuran (PeCDF) 57117-31-4 year 9.1E-08 1.5E-05 7.4E-072,3,7,8-Tetrachlorodibenzofuran (TcDF) 51207-31-9 year 2.6E-07 4.3E-05 2.1E-06Ponceau 3R 3564-09-8 year 2.2E-01 3.5E+01 1.8E+00Ponceau MX 3761-53-3 year 7.7E-01 1.2E+02 6.2E+00Potassium bromate 7758-01-2 year 7.1E-03 1.2E+00 5.8E-02



PeriodASIL

(µg/m3)

SQER(lb/averaging

period)


period)Procarbazine 671-16-9 year 2.5E-04 4.1E-02 2.0E-03Procarbazine hydrochloride 366-70-1 year 2.9E-04 4.8E-02 2.4E-031,3-Propane sultone 1120-71-4 year 1.4E-03 2.4E-01 1.2E-02Propionaldehyde 123-38-6 24-hr 8.0E+00 5.9E-01 3.0E-02Propylene 115-07-1 24-hr 3.0E+03 2.2E+02 1.1E+01Propylene glycol 57-55-6 24-hr 2.8E+01 2.1E+00 1.1E-01Propylene glycol dinitrate 6423-43-4 24-hr 2.8E-01 2.1E-02 1.0E-03Propylene glycol monomethyl ether 107-98-2 24-hr 7.0E+03 5.2E+02 2.6E+01Propylene oxide 75-56-9 year 2.7E-01 4.4E+01 2.2E+00Propylthiouracil 51-52-5 year 3.4E-03 5.6E-01 2.8E-02Refractory ceramic fibers (fibers/cubic centimeter) — 24-hr 3.0E-02 2.2E-03 1.1E-04Reserpine 50-55-5 year 3.2E-04 5.2E-02 2.6E-03Safrole 94-59-7 year 9.6E-03 1.6E+00 7.8E-02Selenide, hydrogen 7783-07-5 1-hr 5.0E+00 9.3E-03 4.6E-04Selenium & selenium compounds (other than hydrogen selenide)

— 24-hr 2.0E+01 1.5E+00 7.4E-02

Silica, crystalline (respirable) 7631-86-9 24-hr 3.0E+00 2.2E-01 1.1E-02Sodium hydroxide 1310-73-2 1-hr 8.0E+00 1.5E-02 7.4E-04Sodium sulfate 7757-82-6 1-hr 1.2E+02 2.2E-01 1.1E-02Sterigmatocystin 10048-13-2 year 1.0E-04 1.6E-02 8.1E-04Streptozotocin 18883-66-4 year 3.2E-05 5.2E-03 2.6E-04Styrene 100-42-5 24-hr 8.7E+02 6.5E+01 3.2E+00Styrene oxide 96-09-3 year 2.2E-02 3.5E+00 1.8E-01Sulfallate 95-06-7 year 1.9E-02 3.0E+00 1.5E-01Sulfur dioxide 7446-09-5 1-hr 6.6E+02 1.2E+00 4.6E-01Sulfur mustard 505-60-2 24-hr 2.0E-02 1.5E-03 7.4E-05Sulfur trioxide 7446-11-9 1-hr 1.2E+02 2.2E-01 1.1E-02Sulfuric acid 7664-93-9 24-hr 1.0E+00 7.4E-02 3.7E-03Tertiary-butyl acetate 540-88-5 year 7.7E-01 1.2E+02 6.2E+001,1,1,2-Tetrachloroethane 630-20-6 year 1.4E-01 2.2E+01 1.1E+001,1,2,2-Tetrachloroethane 79-34-5 year 1.7E-02 2.8E+00 1.4E-011,1,1,2-Tetrafluoroethane 811-97-2 24-hr 8.0E+04 5.9E+03 3.0E+02Tetrahydrofuran 109-99-9 24-hr 2.0E+03 1.5E+02 7.4E+00Thioacetamide 62-55-5 year 5.9E-04 1.0E-01 4.8E-034,4-Thiodianiline 139-65-1 year 2.3E-04 3.8E-02 1.9E-03Thiourea 62-56-6 year 4.8E-02 7.7E+00 3.9E-01Titanium tetrachloride 7550-45-0 24-hr 1.0E-01 7.4E-03 3.7E-04Toluene 108-88-3 24-hr 5.0E+03 3.7E+02 1.9E+01Toluene diisocyanates (2,4- and 2,6-) 26471-62-5 24-hr 8.0E-03 5.9E-04 3.0E-05Toluene-2,4-diisocyanate 584-84-9 24-hr 8.0E-03 5.9E-04 3.0E-05Toluene-2,6-diisocyanate 91-08-7 24-hr 8.0E-03 5.9E-04 3.0E-05o-Toluidine 95-53-4 year 2.0E-02 3.2E+00 1.6E-01o-Toluidine hydrochloride 636-21-5 year 2.7E-02 4.4E+00 2.2E-01Toxaphene (polychlorinated camphenes) 8001-35-2 year 2.9E-03 4.8E-01 2.4E-021,1,1-Trichloroethane (methyl chloroform) 71-55-6 24-hr 5.0E+03 3.7E+02 1.9E+011,1,2-Trichloroethane (vinyl trichloride) 79-00-5 year 6.3E-02 1.0E+01 5.1E-01Trichloroethylene (TCE) 79-01-6 year 2.1E-01 3.4E+01 1.7E+002,4,6-Trichlorophenol 88-06-2 year 3.2E-01 5.2E+01 2.6E+001,2,3-Trichloropropane 96-18-4 24-hr 3.0E-01 2.2E-02 1.1E-03Triethylamine 121-44-8 24-hr 2.0E+02 1.5E+01 7.4E-011,2,3-Trimethylbenzene 526-73-8 24-hr 6.0E+01 4.4E+00 2.2E-011,2,4-Trimethylbenzene 95-63-6 24-hr 6.0E+01 4.4E+00 2.2E-01



PeriodASIL

(µg/m3)

SQER(lb/averaging

period)


period)1,3,5-Trimethylbenzene 108-67-8 24-hr 6.0E+01 4.4E+00 2.2E-01Tryptophan-P-1 62450-06-0 year 1.4E-04 2.2E-02 1.1E-03Tryptophan-P-2 62450-07-1 year 1.1E-03 1.8E-01 8.9E-03Uranium, insoluble compounds, NOS — 24-hr 8.0E-01 5.9E-02 3.0E-03Uranium, soluble salts, NOS — 24-hr 4.0E-02 3.0E-03 1.5E-04Vanadium (fume or dust) 7440-62-2 24-hr 1.0E-01 7.4E-03 3.7E-04Vanadium pentoxide 1314-62-1 1-hr 3.0E+01 5.6E-02 2.8E-03Vinyl acetate 108-05-4 24-hr 2.0E+02 1.5E+01 7.4E-01Vinyl bromide 593-60-2 24-hr 3.0E+00 2.2E-01 1.1E-02Vinyl chloride 75-01-4 year 1.1E-01 1.8E+01 9.2E-01Xylene (mixture), including m-xylene, o-xylene, p-xylene 1330-20-7 24-hr 2.2E+02 1.6E+01 8.2E-01m-Xylene 108-38-3 24-hr 2.2E+02 1.6E+01 8.2E-01o-Xylene 95-47-6 24-hr 2.2E+02 1.6E+01 8.2E-01p-Xylene 106-42-3 24-hr 2.2E+02 1.6E+01 8.2E-01

NOS - Not otherwise specified. This applies to situations where emission factors for a group of pollutants is reported, but specific isomers, congeners, or chemicals are not reported.[Statutory Authority: Chapter 70.94 RCW. WSR 19-24-025 (Order 18-07), § 173-460-150, filed 11/22/19, effective 12/23/19. Statutory Authori-ty: Washington Clean Air Act, RCW 70.94.152. WSR 09-11-131 (Order 05-19), § 173-460-150, filed 5/20/09, effective 6/20/09. Statutory Au-thority: Chapter 70.94 RCW. WSR 94-03-072 (Order 93-19), § 173-460-150, filed 1/14/94, effective 2/14/94. Statutory Authority: RCW 70.94.331. WSR 91-13-079 (Order 90-62), § 173-460-150, filed 6/18/91, effective 9/18/91.]

Reviser's note: The brackets and enclosed material in the text of the above section occurred in the copy filed by the agency.


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